Re:Zoom rolled their own encryption scheme, transmit keys th...
by akimball on Saturday April 04, 2020 @04:40PM
(#22781345)
When you control the content of the stream, you control whether there are repeated blocks. If there are none, do any objections to ECB remain?
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Re:Zoom rolled their own encryption scheme, transmit keys th...
by tptacek on Saturday April 04, 2020 @04:52PM
(#22781426)
Yes: ECB is also somewhat malleable, and uniquely vulnerable to "cut-and-paste" attacks since nothing ties a run of ciphertext blocks to its position in the stream. But these arguably aren't especially relevant to Zoom's threat model.